could
The German word 'könnte' is the past tense of the verb 'können', which means 'to be able to'. It is used to express possibility, ability, or permission in the past. It is also used to express a hypothetical situation in the present or future.
I could go to the cinema.
The German word 'könnte' is used in conditional sentences to express the possibility of an action which is 'Ich könnte ins Kino gehen.' in English translates to 'I could go to the cinema.'
He could read the book.
The verb 'könnte' is also utilized in expressing an action that a person might possibly do in the future as in the sentence 'Er könnte das Buch lesen.', which means 'He could read the book.' in English.
She could eat an apple.
'Könnte' is used here to depict an action 'Sie könnte einen Apfel essen.', in English ‘She could eat an apple.', that someone has the choice or ability to do.